{"attribution":"MCP Queen — the evidence layer for MCP (https://mcpqueen.com)","license":"CC BY 4.0 — free to use with attribution and a link to mcpqueen.com","methodology":"https://mcpqueen.com/registry#methodology","docs":"https://mcpqueen.com/api","generated_at":"2026-07-17T02:43:48.188Z","server":{"name":"io.github.pipeworx-io/duffel","title":"Duffel","description":"Duffel MCP — live flight search + pricing via the Duffel Flights API (duffel.com)","version":"0.1.0","remote_url":"https://gateway.pipeworx.io/duffel/mcp","repo_url":"https://github.com/pipeworx-io/mcp-duffel"},"operational_grade":{"grade":"A","score":94,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":2429,"tool_count":31,"probed_at":"2026-07-14T12:15:34.658Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 2429ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-03-26, serverInfo pipeworx-gateway@0.1.0"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 31 tools e.g. \"ask_pipeworx\"; 31/31 described, 31/31 fully-typed schemas, median description 703 chars"},{"criterion":"latency","points":4,"max":10,"evidence":"initialize round-trip 2429ms"},{"criterion":"provenance","points":15,"max":15,"evidence":"description present; repository linked; version 0.1.0; namespace io.github.pipeworx-io matches endpoint/repo"}],"protocol_access":"open"},"field_semantics":{"auth_state":"Deprecated name retained for compatibility. It means protocol handshake/discovery access only, not tool-level data entitlement.","protocol_access":"Preferred name for auth_state."},"audit_state":"unaudited","observations":[],"response_benchmarks":[],"reviewed_field_reports":[],"interpretation":"Dimensions are independent; missing evidence is not a pass; field reports are qualitative, moderated and never votes."}